Born in Walton in Gordano, Somerset, Geoff and his mother moved to the town Portishead when he was eleven, after his parents divorced. After being involved in many local rock bands, playing drums and DJ'ing in hip hop groups, Barrow got his first job at the Coach House Studios as a tape operator soon after it opened in 1989. In 1991, while he was assisting on Massive Attack's breakthrough album Blue Lines, the band allowed him spare studio time to get his own ideas on tape. A few years later, when the Portishead project had been assembled, the group came back to record "Sour Times" in that same studio. At the dawn of the '90s, Barrow was making a name for himself as a remixer, working with such artists as Primal Scream, Paul Weller, Gabrielle and Depeche Mode. In addition, Barrow had produced a track for Tricky and written songs for Neneh Cherry.